Device for detecting electrothermal driving performance of shape memory alloy in deep sea extreme environment
By detecting the electric-thermal driving performance of shape memory alloys in the deep-sea extreme environment simulation cabin, the problem of detection in the deep-sea environment is solved, efficient and accurate detection results are achieved, and the intelligent process of deep-sea equipment is promoted.
Patent Information
- Application Number
- CN202421791318.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The prior art is unable to accurately detect the electric thermal driving performance of shape memory alloys in extreme deep sea environments, resulting in limited applications in deep sea engineering.
A shape memory alloy electric thermal drive performance detection device in the extreme environment of deep sea was designed, including a deep sea environment simulation chamber, a temperature-controlled self-reset system, a pressure test pump, a power supply and a digital acquisition control module. By simulating the deep sea high-voltage, low temperature, strong corrosion and conductive environment, the resistance perception performance of the shape memory alloy is collected using a digital multimeter and a computer.
It realizes efficient and accurate detection in extreme deep-sea environments, improves detection accuracy and efficiency, reduces costs, broadens the application field of shape memory alloys, and provides experimental support for the small-scale intelligent upgrade of deep-sea equipment.
Smart Images
Figure CN223139737U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of simulation detection of shape memory alloy materials for extreme marine environments, and particularly relates to a detection device for the electrothermal driving performance of shape memory alloy wires under simulated deep-sea extreme environments such as high hydrostatic pressure, low temperature, electrical conductivity, and strong corrosiveness in a laboratory. Background Technique
[0002] Approximately 90% of the ocean area is at a depth of more than 1000 meters. It has huge potential for oil and gas, power, biological, and mineral resources and is the core area of "smart ocean" and deep-sea engineering applications. However, due to its extreme environmental attributes of high hydrostatic pressure, low temperature, electrical conductivity, and strong corrosiveness, humans must rely on underwater system equipment such as manned submersibles, unmanned submersibles, landers, and gliders to explore and investigate its resources. The core driving forces of underwater system equipment mainly rely on deep-sea drivers such as motors, hydraulics, and electromagnetics. With the deep integration of emerging technologies such as artificial intelligence, big data, and network cloud in the ocean field, the inherent deficiencies of traditional deep-sea drivers such as large weight-volume, high cost, low long-term reliability, and poor biocompatibility are infinitely magnified. New concept drivers based on shape memory alloy drive are gradually advancing into the deep sea due to their advantages such as miniaturization, intelligence, refinement, and low energy consumption, and have become one of the frontiers of the cross-application of marine science and technology and multiple disciplines in recent years.
[0003] Shape memory alloy is a new type of lightweight functional material with biotic characteristics that integrates sensing, driving, and control. With the in-depth theoretical research, the scenario applications of shape memory alloys have been continuously expanded and integrated in many branch disciplines, and have gradually extended from the initial aerospace and military fields to applications in fields such as automobiles, energy, electromechanics, and biomedicine. Its excellent performance enables it to directly output electrical energy to mechanical energy, thus avoiding or partially avoiding pressure-resistant and sealing structures. The entire system has a simple structure, with ultra-small weight and volume that cannot be compared with traditional underwater drivers. Its deficiencies of slow heat dissipation and low execution efficiency can be well avoided in liquid media. In recent years, with the in-depth research on marine equipment, the complementary application of the advantages and disadvantages of shape memory alloys in the marine engineering field has attracted extensive attention, but its physical characterization, experimental devices, and methods in extreme deep-sea environments are still blank. At present, although shape memory alloy is the smart material closest to practical application in ocean engineering, its application in extreme deep-sea environments is still in its infancy, and the electro-thermal-mechanical coupling driving characteristics under high hydrostatic pressure, low temperature, strong corrosion, and conductive environmental media are not clear, resulting in the failure to achieve marine engineering applications.
[0004] At present, the detection devices and methods for the electrothermal driving performance of shape memory alloys in the air medium environment at normal temperature and pressure are relatively complete. They can be directly detected at normal temperature and pressure with the help of a regulated power supply, a contact thermometer, a test tooling, and related conventional equipment. The environmental parameters are relatively single and highly controllable. However, the air medium environment detection device cannot simulate the extreme environmental properties of deep sea high pressure, low temperature, strong corrosion, and electrical conductivity, and thus cannot conduct detections. As a result, it is impossible to truly understand the electrothermal driving performance characterization of shape memory alloys in extreme environments, and this problem has always been the key issue restricting the stable engineering application of shape memory alloys in the deep sea. In the underwater environment, especially the application in the deep sea extreme environment is still in the exploratory stage. The detection devices and methods for the electrothermal driving performance of shape memory alloys in a simulated environment of high hydrostatic pressure, low temperature, strong corrosion, and electrical conductivity are still blank, and there is no mature technical implementation plan at the present stage. Therefore, there is an urgent need for a simulated detection device that can accurately control the deep sea extreme environmental parameters to conduct systematic experimental research on the electrothermal driving self-sensing characteristics of shape memory alloys. Summary of the Invention
[0005] The purpose of the present invention is to overcome the drawbacks in the background technology and provide a detection device for the electrothermal driving performance of shape memory alloys in the deep sea extreme environment, which can conveniently and efficiently capture and detect the electrothermal driving self-sensing performance of shape memory alloy wires in a simulated deep sea environment, solve the problem that there is no mature technical solution for the performance detection of shape memory alloys in the deep sea extreme environment at the present stage, thereby improving the detection accuracy, practical efficiency, and reliability of detection results, reducing the detection cost, and shortening the cycle.
[0006] The detection device for the electrothermal driving performance of shape memory alloys in the deep sea extreme environment includes a deep sea environment simulation chamber, a temperature control self-resetting system for installing shape memory alloys, a pressure test pump, a power supply, and a data acquisition and control module; wherein the deep sea environment simulation chamber is a high-pressure container, and one end of the deep sea environment simulation chamber is connected to the pressure test pump; the other end of the deep sea environment simulation chamber is provided with an opening, and the opening is provided with a detachable hatch cover. When in use, the hatch cover is hermetically connected to the chamber body. The temperature control self-resetting system is installed on the hatch cover and is integrally placed inside the deep sea environment simulation chamber and is in insulating contact with the chamber body. The conductive device passes through the hatch cover to electrically connect the shape memory alloy installed in the temperature control self-resetting system with the power supply and the data acquisition and control module arranged outside the deep sea environment simulation chamber.
[0007] Furthermore, the temperature-controlled self-resetting system consists of a support rod, an insulating pulley, a pulley bracket, a limit block, a compression spring, and a spring support column; the base of the support rod is fixedly connected to the inner side of the hatch cover through bolts, and a pulley bracket is fixed to the top of the support rod. The insulating pulley is fixed to the pulley bracket through a smooth rod cotter pin; the limit block has a through hole for the spring support column to pass through, one end contacts the inner wall of the cabin body, and the other end is fixedly connected to the support rod through bolts; after the spring support column is sleeved into the compression spring, it passes through the through hole of the limit block and is threadedly connected to the pulley bracket; during use, the shape memory alloy wire passes through the insulating pulley in a loop, and both ends of the shape memory alloy wire are respectively connected to the conductive device.
[0008] Furthermore, the conductive device is two metal screw rods. One end of each metal screw rod is equipped with a threaded adapter for connecting to the shape memory alloy wire. The shape memory alloy wire is locked and connected to the external threaded ends of the two threaded adapters through nuts; the other end passes through the hatch cover and is respectively connected to the power supply and the data acquisition and control module through cable wires.
[0009] Furthermore, the data acquisition and control module is a high-speed digital multimeter, and the data acquisition and control module is connected to a computer.
[0010] Furthermore, between the hatch cover and the cabin body of the deep-sea environment simulation chamber, a combined seal of threads and radial O-rings is adopted to form a high-pressure vessel with a maximum working pressure of 120 MPa.
[0011] Furthermore, the deep-sea environment simulation chamber is made of conductive material. Insulating gaskets are provided on both the inner and outer sides of the hatch cover for the metal screw rods, and the middle section is sleeved with an insulating heat shrinkable tube; the limit block is an insulating limit block.
[0012] Furthermore, the conductive screw rod, the support rod, and the threaded adapter are made of stainless steel.
[0013] Furthermore, the power supply is a DC adjustable regulated power supply; the pressure test pump is connected to the deep-sea environment simulation chamber through a high-pressure explosion-proof hard pipe and achieves pressure resistance and watertightness with the help of a ferrule threaded joint. The pressure test pump is a manual pressure test pump.
[0014] Furthermore, at one end where the deep-sea environment simulation chamber is connected to the pressure test pump, a detachable hatch cover II is provided. The pressure test pump is installed on the hatch cover II through a high-pressure pipe, and during use, the hatch cover II is hermetically connected to the cabin body.
[0015] A method for detecting the electrothermal driving performance of a shape memory alloy under extreme deep-sea environments specifically includes the following steps:
[0016] Step 1: Place the temperature-controlled self-resetting system into the deep-sea environment simulation chamber and fix it to the chamber cover. Add artificial seawater with the same salinity as the in-situ deep-sea seawater to the manual pressure test pump water tank, adjust the seawater temperature, and at the same time connect external instruments such as power supply and digital multimeter, and check the watertightness and continuity of the overall test link; Apply a certain current excitation to the shape memory alloy wire through an external power supply, and use a high-speed digital multimeter and a computer to collect the resistance sensing performance of the shape memory alloy under the action of Joule heat to form the initial value at 0 MPa pressure;
[0017] Step 2: Manually pressurize the test pump uniformly to the set hydrostatic pressure and then perform the pressure-holding operation. During the pressurization and pressure-holding processes, jointly use a high-speed digital multimeter and a computer to collect and record the real-time data of the resistance sensing performance of the shape memory alloy without Joule heat drive; During the pressure-holding period, set the excitation current and time applied across the shape memory alloy through an external regulated power supply, collect the resistance sensing performance data of the shape memory alloy under different excitation gradient values, and compare them with the data without Joule heat excitation, so as to form the state feedback of the shape memory alloy in the extreme deep-sea simulation environment;
[0018] Step 3: After the pressure-holding ends, reduce the pressure at a uniform speed until the pressure reaches 0 MPa and then terminate the detection. During the pressure reduction process, synchronously collect the resistance sensing performance data of the shape memory alloy; After the detection ends, open the chamber cover, take out the temperature-controlled self-resetting system, and check and calibrate the performance of the shape memory alloy wire.
[0019] Furthermore, in Step 1, adjust the seawater temperature by putting ice cubes or dry ice into the seawater to adjust the temperature of the seawater medium environment to 1 - 2 °C; in Step 2, the pressurization speed of the manual pressure test pump is 2 - 3 MPa / min.
[0020] Specifically, the shape memory alloy electrothermal drive performance detection device under extreme deep-sea environments of the present utility model includes an extreme deep-sea environment simulation chamber, a temperature-controlled self-resetting system for installing the shape memory alloy, a manual pressure test pump, a power supply, a digital multimeter, and a computer. Among them, the extreme deep-sea environment simulation chamber is a high-pressure container with threaded and radial seals. The container includes a chamber cover and a chamber body, and the chamber cover and the chamber body are evenly provided with through-chamber holes; the shape memory alloy temperature-controlled self-resetting system is entirely placed inside the deep-sea environment simulation chamber and consists of a shape memory alloy wire, a stainless-steel screw rod, a stainless-steel support rod, a stainless-steel threaded adapter, an insulating pulley, a pulley bracket, an insulating limit block, a compression spring, and a spring support column. Among them, the stainless-steel threaded adapter is connected through the through-chamber of the stainless-steel screw rod with the chamber cover of the deep-sea environment simulation chamber. The base of the stainless-steel support rod is fixed to the inner side of the simulation chamber cover by bolts. The shape memory alloy wire is guided and looped by the insulating pulley and is locked and connected to the external threaded end of the stainless-steel threaded adapter by a nut. The insulating pulley and the pulley bracket are fixed by a polished rod cotter pin. The insulating limit block is fixed to the stainless-steel support rod by bolts. The spring support column is sleeved into the compression spring and then connected to the pulley bracket by bolts; the manual pressure test pump is placed outside the deep-sea simulation chamber and is connected to the bottom of the simulation chamber body through a high-pressure explosion-proof hard pipe and achieves pressure-resistant watertightness by means of a ferrule joint; the power supply is welded to the through-chamber stainless-steel screw rod led out from the chamber cover of the simulation chamber through a cable wire; the through-chamber stainless-steel screw rod separately leads out cable wires to be connected to the digital multimeter, and the digital multimeter is then connected to the computer, so as to detect the self-sensing drive performance manifested by applying an external Joule heat excitation to the shape memory alloy under the extreme deep-sea simulation environment, and realize multiple cycle tests without opening the chamber under the action of the temperature-controlled self-resetting system.
[0021] The detection method using the present utility model includes the following steps:
[0022] The first step: First, place the shape memory alloy temperature-controlled self-resetting system into the extreme deep-sea environment simulation chamber and fix it to the chamber cover. Install the chamber cover and connect the manual pressure test pump. Add artificial seawater with the same salinity as the in-situ deep-sea seawater to the water tank of the pressure test pump. Put ice cubes or dry ice into the seawater to adjust the seawater environmental temperature. At the same time, connect external instruments such as the power supply and the digital multimeter, and check the watertightness and continuity of the overall test link. Apply a certain current excitation to the shape memory alloy wire through the external power supply to cause the wire to contract and deform. At the same time, the spring support column moves with the wire, forcing the spring to be indirectly compressed (after power-off, the temperature-controlled self-resetting system resets by means of the spring). Use the high-speed digital multimeter and the computer to collect the resistance sensing performance of the shape memory alloy under the action of Joule heat to form an initial value under 0 MPa pressure.
[0023] Step 2: After being ready, apply pressure uniformly at a certain speed until the set hydrostatic pressure is reached, and then perform the pressure-holding operation. During the pressure application and pressure-holding processes, jointly use a high-speed digital multimeter and a computer to collect and record real-time data on the resistance sensing performance of the shape memory alloy without Joule heat drive. During the pressure-holding period, set the excitation current and time applied across the shape memory alloy through an external regulated power supply, collect the resistance sensing performance data of the shape memory alloy at different excitation gradient values, and compare them with the data without Joule heat excitation, so as to form the state feedback of the shape memory alloy in the deep-sea extreme simulation environment.
[0024] Step 3: After the pressure-holding ends, reduce the pressure at a uniform speed until the pressure reaches 0 MPa and then terminate the detection. During the pressure reduction process, synchronously collect the resistance sensing performance data of the shape memory alloy. After the detection ends, open the deep-sea simulation hatch cover, take out the temperature-controlled self-resetting system, and check and calibrate the performance of the shape memory alloy wire.
[0025] The utility model simulates the deep-sea extreme environment through a deep-sea environment simulation chamber, and realizes the detection of the self-sensing driving performance of the shape memory alloy under the external Joule heat excitation in the deep-sea extreme simulation environment through an external power supply, and realizes multiple cycle tests without opening the hatch under the action of the temperature-controlled self-resetting system, and has the following technical effects:
[0026] 1. The device and method of the utility model can conveniently and efficiently capture and detect the electrothermal driving self-sensing performance of the shape memory alloy material in the extreme environments of deep-sea high pressure, low temperature, strong corrosion and conductivity, solve the problem that there is no mature technical solution for the performance detection of the shape memory alloy in the deep-sea environment at the present stage, avoid the measurement distortion in the normal temperature and pressure environment, and improve the detection accuracy, practical efficiency and the reliability of the detection results.
[0027] 2. The detection device of the utility model can simulate the deep-sea high-pressure environment of up to 120 MPa underwater at most, the detection range can cover the whole ocean depth, has wide applicability, is simple to operate, and can realize multiple cycle tests without opening the hatch for a single assembly, so that the overall detection efficiency is increased by more than 60%, and the detection cost and cycle will be reduced by more than 50%.
[0028] 3. The utility model realizes the breakthrough from scratch of the test device and its detection method for the shape memory alloy in the deep-sea extreme environment, fills the blank in the relevant technical field, accelerates the process of its stable engineering application in the deep sea, and provides good experimental support for the miniaturized and intelligent upgrade of deep-sea equipment.
[0029] 4. The utility model provides good basic support for the exploration of multidisciplinary cross-application, not only optimizes the test cost of deep-sea equipment, but also broadens the application field of the shape memory alloy, and brings new economic growth combination points for multidisciplinary cross-application. Description of the Drawings
[0030] Figure 1 .Partial sectional schematic diagram of the detection device for the electrothermal driving performance of shape memory alloy under deep - sea extreme environment.
[0031] Figure 2 .Schematic structure of the temperature - controlled self - reset system.
[0032] Figure 3 .Schematic diagram of the temperature - controlled self - reset system installed with shape memory alloy.
[0033] Among them, 1. Deep - sea extreme environment simulation chamber; 2. Shape memory alloy wire; 3. Insulating pulley; 4. Compression spring; 5. Stainless steel support rod; 5 - 1. Stainless steel support rod base; 6. Spring support column; 7. Insulating limit block; 8. Pulley bracket; 9. Stainless steel threaded adapter; 10. Insulating gasket; 11. Stainless steel lead screw; 12. Cable conductor; 13. High - voltage explosion - proof hard pipe; 14. Ferrule joint; 15. Manual pressure test pump; 16. Power supply; 17. Digital multimeter; 18. Computer. Detailed Embodiment
[0034] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with embodiments.
[0035] Such as Figures 1 - 3As shown in the figure, the device for detecting the electrothermal driving performance of shape memory alloys in deep-sea extreme environments provided by the embodiments of the present utility model includes a deep-sea extreme environment simulation chamber 1, a temperature-controlled self-resetting system 2, 3, 4, 5, 6, 7, 8, 9, 11 for installing shape memory alloys, a manual pressure test pump 15, a power supply 16, a digital multimeter 17, and a computer 18. Among them, the deep-sea extreme environment simulation chamber 1 is a high-pressure vessel sealed by a combination of threads and radial O-rings, with a maximum working pressure of up to 120 MPa. The container includes a chamber cover and a chamber body. The chamber cover and the chamber body are evenly provided with through-chamber holes to facilitate the through-chamber connection of the detection link; the shape memory alloy temperature-controlled self-resetting system is placed entirely inside the deep-sea environment simulation chamber 1 and is in insulating contact with the chamber body. It consists of a shape memory alloy wire 2, a stainless steel screw rod 11, a stainless steel support rod 5, a stainless steel threaded adapter 9, an insulating pulley 3, a pulley bracket 8, an insulating limit block 7, a compression spring 4, and a spring support column 6. Among them, the stainless steel threaded adapter 9 is connected through the through-chamber of the stainless steel screw rod 11 to the chamber cover of the deep-sea environment simulation chamber 1. The inner and outer sides of the chamber cover of the simulation chamber 1 are in contact through insulating gaskets 10. The outside of the screw rod 11 is coated with a heat-shrinkable insulating layer. The base 5-1 of the stainless steel support rod 5 is fixed to the inner side of the chamber cover of the simulation chamber 1 by bolts. The shape memory alloy wire 2 passes through the insulating pulley 3 in a loop and is locked and connected to the external threaded end of the stainless steel threaded adapter 9 by a nut. The insulating pulley 3 and the pulley bracket 8 are fixed by a smooth rod cotter pin. One end of the insulating limit block 7 contacts the inner wall of the chamber body, and the other end is fixed to the stainless steel support rod 5 by bolts. After the spring support column 6 is sleeved into the compression spring 4, it passes through the through-hole of the insulating limit block 7 and is threadedly connected to the pulley bracket 8; the manual pressure test pump 15 is placed outside the deep-sea simulation chamber 1 and is connected to the bottom surface of the simulation chamber 1 through a high-pressure explosion-proof hard pipe 13. The connection is made water-tight and pressure-resistant by a ferrule threaded joint 14; the power supply 16 is welded to the through-chamber stainless steel screw rod 11 led out from the chamber cover of the simulation chamber 1 through a cable wire 12; the stainless steel screw rod 11 separately leads out cable wires 12 and is connected to the digital multimeter 17, and the digital multimeter 17 is then connected to the computer 18. Thus, an external Joule heat excitation signal is applied to the shape memory alloy wire 2 through the power supply 16 in the deep-sea extreme simulation environment, and the self-sensing driving performance state shown by the shape memory alloy is collected by a combination of the digital multimeter 17 and the computer 18. At the same time, with the help of the temperature-controlled self-resetting system, multiple cyclic tests can be carried out without opening the chamber.
[0036] The method for detecting the electrothermal driving performance of shape memory alloys in deep-sea extreme environments of the present utility model is as follows:
[0037] Step 1: Calculate and select stainless steel support rods 5 and compression springs 4 of a certain specification, and combine shape memory alloy wires 2, insulating pulleys 3, spring support columns 6, insulating limit blocks 7, pulley brackets 8, stainless steel threaded adapters 9, and stainless steel lead screws 11 to construct a shape memory alloy temperature-controlled self-resetting system. Then fasten the temperature-controlled self-resetting system to the hatch of the deep-sea extreme environment simulation chamber 1 with bolts;
[0038] Step 2: Under normal atmospheric air environment, connect the shape memory alloy temperature-controlled self-resetting system to an external power supply 16, a high-speed digital multimeter 17, and a computer 18 through a cable wire 12. Connect the high-speed digital multimeter 17 and the computer 18. Relying on the external power supply 16, apply a current excitation to the shape memory alloy wire 2, and collect and calibrate the resistance sensing performance of the shape memory alloy wire 2 under the action of Joule heat with the help of the high-speed digital multimeter 17 and the computer 18;
[0039] Step 3: Place the calibrated shape memory alloy temperature-controlled self-resetting system together with the hatch into the deep-sea extreme environment simulation chamber 1. Install the hatch and connect external instruments such as a manual pressure test pump 15, a power supply 16, and a digital multimeter 17. Check the watertightness and continuity of the overall test link. Add artificial seawater with the same salinity as the in-situ seawater in the deep sea to the water tank of the pressure test pump 15, and put ice cubes or dry ice into the seawater to adjust the seawater environmental temperature. Based on the Joule heat excitation of the external power supply 16, collect the initial value of the resistance sensing of the shape memory alloy under 0 MPa hydrostatic pressure;
[0040] Step 4: After preparation, uniformly pressurize to the set hydrostatic pressure at a certain speed and then perform a pressure holding operation. During the pressurization and pressure holding processes, jointly use the high-speed digital multimeter 17 and the computer 18 to collect and record the real-time data of the resistance sensing performance of the shape memory alloy in the state without Joule heat drive. During the pressure holding period, set the excitation current and time applied across the shape memory alloy wire 2 through the external regulated power supply 16, collect the resistance sensing performance data of the shape memory alloy wire 2 at different excitation gradient values, and compare them with the data without Joule heat excitation;
[0041] Step 5: After the pressure holding ends, reduce the pressure at a uniform speed until the pressure reaches 0 MPa and then terminate the detection. Synchronously collect the resistance sensing data of the shape memory alloy wire 2 during the pressure reduction process. After the detection ends, open the hatch of the deep-sea simulation chamber 1, take out the temperature-controlled self-resetting system, and check and calibrate the performance of the shape memory alloy wire 2.
Claims
1. Shape memory alloy electrothermal drive performance detection device under deep-sea extreme environment, characterized in that: It includes an environmental simulation cabin, a temperature-controlled self-resetting system for installing shape memory alloys, a manual pressure test pump, a power supply, a digital multimeter and a computer; the temperature-controlled self-resetting system is placed as a whole inside the deep-sea extreme environment simulation cabin and is insulated from the simulation cabin body; the simulation cabin is a cylindrical body comprising an upper end cover and a lower end cover, which are sealed and connected to the body to form a high-pressure container when in use, a metal wire rod is fixed on the upper end cover, the temperature-controlled self-resetting system is fixed on the bottom surface of the upper end cover and is connected to one end of the metal wire rod; the other end of the metal wire rod passes through the upper end cover and is respectively connected to an external power supply and a digital multimeter through cable conductors; the digital multimeter is connected to a computer; a through-cabin threaded hole is provided on the lower end cover, and the manual pressure test pump is placed outside the simulation cabin and is sealed and connected to the through-cabin hole of the lower end cover.
2. The detection device according to claim 1, characterized in that: The temperature control self-resetting system consists of a support rod, a threaded adapter, an insulating pulley, a pulley bracket, an insulating limit block, a compression spring and a spring support column; the base of the support rod is fixedly connected to the bottom surface of the upper end cover of the simulation cabin by bolts, and two cabin-penetrating screw rods on the inner bottom surface of the upper end cover of the simulation cabin pass through insulating gaskets and are fastened together with the internal threaded ends of two conductive threaded adapters; a pulley bracket is fixed to the top of the support rod, and the insulating pulley and the pulley bracket are fixed by a light rod pin; the insulating limit block has a through hole for the spring support column to pass through, and the arc surface of one end of the insulating limit block contacts the inner wall of the cabin, and the other end is fixed to the stainless steel support rod by bolts; the spring support column passes through the compression spring and then passes through the through hole of the insulating limit block and is threadedly connected to the pulley bracket; when in use, the shape memory alloy wire passes through the insulating pulley loop, and the two ends are respectively locked and connected to the external threaded ends of the two threaded adapters by nuts.
3. The detection device according to claim 2, characterized in that: The support rod and the threaded adapter are made of stainless steel.
4. The detection device according to claim 2, characterized in that: The top end of the support rod is provided with a slide groove which can adjust the installation position of the insulating limit block.
5. The detection device according to claim 1, wherein: The metal wire rod is provided with insulating gaskets inside and outside the cabin penetration hole of the upper end cover, and the middle section is covered with an insulating heat shrink tube.
6. The detection device according to claim 1, wherein: The metal wire rod is made of stainless steel.
7. The detection device according to claim 1, wherein: The manual pressure test pump is connected to the through-cabin threaded hole of the lower end cover of the simulation cabin through a high-pressure explosion-proof hard pipe and is pressure-resistant and watertight with the help of a ferrule threaded joint.
8. The detection device according to claim 1, wherein: The digital multimeter is a high-speed digital multimeter.
9. The detection device according to claim 1, wherein: The simulation cabin is a high-pressure container sealed by a combination of threads and radial O-rings, and the maximum working pressure can reach 120MPa.